Devarim 3:21

21 And I commanded Yehoshua at that time, saying, Thine eyes have seen all that Hashem Eloheichem hath done unto these two melachim; so shall Hashem do unto all the kingdoms whither thou passest.

Devarim 3:21 Meaning and Commentary

Deuteronomy 3:21

And I commanded Joshua at that time
After the conquest of the two kings, and the assignment of their countries to the above tribes; and after Moses had it made known to him that he should quickly die, and Joshua should be his successor; then, by the direction of God, he gave him the following charge:

saying, thine eyes have seen all that the Lord your God hath done unto
these two kings;
Sihon and Og; how their kingdoms were taken from them, and given to Israel, and they slain with the sword; this Joshua was an eyewitness of, and was, no doubt, greatly concerned in the battles with them, being the general in the Israelitish armies; at least this was sometimes his post, and he cannot be thought to have been unemployed in these wars:

so shall the Lord do unto all the kingdoms whither thou passest;
all the kingdoms in the land of Canaan, where there were many, thirty one at least; these would be all conquered and put into the hands of the Israelites, and their kings slain.

Devarim 3:21 In-Context

19 But your nashim, and your little ones, and your livestock (for I know that ye have much livestock,) shall abide in your towns which I have given you;

20 Until Hashem have given rest unto your brethren, as well as unto you, and until they also possess ha’aretz which Hashem Eloheichem hath given them beyond Yarden; and then shall ye return every man unto his yerushah (possession, inheritance), which I have given you.

21 And I commanded Yehoshua at that time, saying, Thine eyes have seen all that Hashem Eloheichem hath done unto these two melachim; so shall Hashem do unto all the kingdoms whither thou passest.

22 Ye shall not fear them; for Hashem Eloheichem He shall fight for you.

23 And I besought Hashem at that time, saying,